Question

Maria is tracking the outside temperature for her science journal. At 6:00 a.m., it was -4.2℉. By noon, the temperature rose by 6.5℉. Later that night, a cold front moved in, and the temperature dropped by 10.7℉.


What was the temperature at the end of the day? Show all of your work and label your answer with the correct sign and unit for full points.

Answer 1

Start: -4.2°F

Rise by 6.5°F at noon:
-4.2 + 6.5 = 2.3°F

Drop by 10.7°F later:
2.3 - 10.7 = -8.4°F

Answer: -8.4°F (negative 8.4 degrees Fahrenheit)